技術論文
エアロゾル個数濃度エアロゾル・センサによるPM2.5 の推定
2014 年 29 巻 1 号 p. 33-38
詳細
2014 年 29 巻 1 号 p. 33-38
We hypothesized that PM2.5 mass concentration could be estimated by the number concentration of aerosol when the aerosol in the accumulation mode is formed by the aggregation of primary particles.In order to verify this hypothesis, long term parallel observations of PM2.5 were carried out in the urban area atmosphere of Kobe city, Japan for 211 days by using aerosol monitors for the aerosol number concentration and PM2.5 mass concentration. The product-moment correlation coefficient of PM2.5 and number concentrations is 0.88, suggesting that the hypothesis was consistent with the observations.Therefore PM2.5 mass concentration can be evaluated by the number concentration of aerosols. Parallel measurements with PM2.5 monitor and the sensor for aerosol number concentration are necessary to determine the conversion coefficient. Once the conversion coefficient is established, we may readily construct PM2.5 monitoring networks by using aerosol sensors for number concentrations.
